I was really moved and this is my first review here. It is not often one comes across such a different film. Being an outdoor person myself I can completely feel the passion with which these people explore the caves of Mexico. Really beautiful images, very deep thoughts and some amazing filmmaking here. This is not your typical Hollywood/NatGeo/Discovery type documentary at all. It is obviously made by people who have put their soul into the movie. I also saw a negative comment about the magnificent young person featured in the movie. What a shame and kudos to him! It seems that there are haters everywhere these days. Don't mind all this - watch this stellar movie. Great thanks to the people who made this possible! For me, as a non-diver and non-caver this is opening a door to a world which I would never see otherwise. Would recommend this film to all. 10 of 10.